Lots. I'm a terribly fussy eater to the point where I think it's developed into a phobia. Put down any sort of mean in front of me and I'll eat it. It could be rat meat or whatever and I'd still eat it if it was safe, but I just can't touch vegetables. The only vegetables I can eat are peas, everything else just tastes horrible to me. I've tried carrots, broccoli, lettuce, cauliflower and others that I can't remember and they all make me instantly gag the moment I try and eat them. It sucks because I really want to like them, especially now since I want to set a good example for my daughter, but it's gotten to the point now where even thinking about eating something like a carrot makes me anxious. It's so stupid and I really hate that I have such a childish reaction to things like this because it makes it really hard to eat healthy meals, but they just repulse me.
There are lots of other things I don't like (fish, baked beans, rice) but if I could stomach vegetables I'd be a much happier person.
On a related note, I hate it when I'm in a bar or out for food and they serve me my coke with a slice of lemon in it.